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Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (Unaudited) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Stock-based compensation $ 137,213 $ 129,893
Unrealized gain on securities 8,747 418
Station operating expenses
   
Stock-based compensation 7,238 2,771
Corporate general and administrative expenses
   
Stock-based compensation $ 129,975 $ 127,122